Here's what's in it for Starbucks: Square's cheaper. Square loses money on transactions below $6. The reason is for the sake of simplicity they waive the per-transaction fee that Visa/Mastercard charges them and just charge a flat percentage of 2.75%. But even though this is a relatively high percentage, it's not enough to recoup the cost of the per-transaction fee at low transaction sizes. Take a $2 coffee charged t…
I'm going to optimistically assume that Square have run the numbers and this deal is worth the price though. As a marketing exercise alone it could be worth a fortune if it ends up putting Square's branding in every Starbucks.